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Diffstat (limited to 'docs/libcurl/opts/GNURLOPT_OPENSOCKETDATA.3')
| -rw-r--r-- | docs/libcurl/opts/GNURLOPT_OPENSOCKETDATA.3 | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/docs/libcurl/opts/GNURLOPT_OPENSOCKETDATA.3 b/docs/libcurl/opts/GNURLOPT_OPENSOCKETDATA.3 new file mode 100644 index 000000000..be3bf94b9 --- /dev/null +++ b/docs/libcurl/opts/GNURLOPT_OPENSOCKETDATA.3 @@ -0,0 +1,81 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. +.\" * +.\" * This software is licensed as described in the file COPYING, which +.\" * you should have received as part of this distribution. The terms +.\" * are also available at https://curl.haxx.se/docs/copyright.html. +.\" * +.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell +.\" * copies of the Software, and permit persons to whom the Software is +.\" * furnished to do so, under the terms of the COPYING file. +.\" * +.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY +.\" * KIND, either express or implied. +.\" * +.\" ************************************************************************** +.\" +.TH GNURLOPT_OPENSOCKETDATA 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options" +.SH NAME +CURLOPT_OPENSOCKETDATA \- custom pointer passed to open socket callback +.SH SYNOPSIS +#include <gnurl/curl.h> + +CURLcode curl_easy_setopt(CURL *handle, CURLOPT_OPENSOCKETDATA, void *pointer); +.SH DESCRIPTION +Pass a \fIpointer\fP that will be untouched by libcurl and passed as the first +argument in the opensocket callback set with \fICURLOPT_OPENSOCKETFUNCTION(3)\fP. +.SH DEFAULT +The default value of this parameter is NULL. +.SH PROTOCOLS +All +.SH EXAMPLE +.nf +/* make libcurl use the already established socket 'sockfd' */ + +static curl_socket_t opensocket(void *clientp, + curlsocktype purpose, + struct curl_sockaddr *address) +{ + curl_socket_t sockfd; + sockfd = *(curl_socket_t *)clientp; + /* the actual externally set socket is passed in via the OPENSOCKETDATA + option */ + return sockfd; +} + +static int sockopt_callback(void *clientp, curl_socket_t curlfd, + curlsocktype purpose) +{ + /* This return code was added in libcurl 7.21.5 */ + return CURL_SOCKOPT_ALREADY_CONNECTED; +} + +curl = curl_easy_init(); +if(curl) { + /* libcurl will internally think that you connect to the host + * and port that you specify in the URL option. */ + curl_easy_setopt(curl, CURLOPT_URL, "http://99.99.99.99:9999"); + /* call this function to get a socket */ + curl_easy_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, opensocket); + curl_easy_setopt(curl, CURLOPT_OPENSOCKETDATA, &sockfd); + + /* call this function to set options for the socket */ + curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_callback); + + res = curl_easy_perform(curl); + + curl_easy_cleanup(curl); +} +.fi +.SH AVAILABILITY +Added in 7.17.1 +.SH RETURN VALUE +Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. +.SH "SEE ALSO" +.BR CURLOPT_OPENSOCKETFUNCTION "(3), " CURLOPT_SOCKOPTFUNCTION "(3), " |